How Do I Reset My Air Conditioner Safely?

To reset an air conditioner safely, shut off power to the system, wait a few minutes, then restore power and restart from the thermostat. Most resets follow a power surge or tripped breaker; the pause lets the control board clear and refrigerant pressures equalize so the compressor doesn't hard‑start. We also serve homes near Homer, so help is close if the reset doesn't hold. A small technician insight: a full five‑minute wait prevents the compressor from pushing against high head pressure.

Do this in order:

• Set thermostat to Off; set Fan to Auto.
• Turn off the outdoor disconnect or switch, if present.
• Switch the HVAC breaker off at the main panel.
• Wait 5–10 minutes.
• Turn on the outdoor disconnect, then the breaker.
• After 5 more minutes, set thermostat to Cool and lower the setpoint.
• Confirm steady airflow and normal sounds.

If the breaker trips again, airflow stops, or you smell burning, stop and call a licensed HVAC technician.

Updated: 2026-08-04

Need help in Homer, IL? Call 217-247-4108 or book online.